Question

a)​ find the ratio of change potential energy to the original potential energy if mass of the object is halved
​
b) find the ratio of change potential energy to the original potential energy if the object is now placed at half of the original height from the ground,

Answer 1

1.)original PE = mgh
New PE =m/2 gh

Ratio= mgh×2/ mph
original : New = 2:1

2.)original PE = mgh
New PE = mgh/2

Ratio= original : New
= mgh×2/ mph
= 2:1